Refine
Document Type
Language
- English (2)
Has Fulltext
- yes (2)
Is part of the Bibliography
- no (2)
Keywords
- Indochina (2) (remove)
Results are presented of an odonatological survey of 23 localities in Thala Barivat District of Stung Treng Province, northern Cambodia, on July 26 – August 1, 2016. Most localities were situated in areas of open low deciduous dipterocarp forests on gravel soils, some at hillside areas of tall evergreen dipterocarp forest. The great Mekong River right bank was studied within 7 km downstream of its Nimith (Nimet, Khon Thai, Labak Koun, Khone Pha Pheng) Waterfall. In total, 55 species were found, of which 52 identified to species and three to genus. Two species, Gynacantha saltatrix Martin, 1909 and Macrogomphus matsukii Asahina, 1986, were recorded in Cambodia for the first time. Five obligatory lotic species were found at the Mekong River, namely Dysphaea gloriosa, Prodasineura coerulescens, Burmagomphus asahinai, Nychogomphus duaricus and Onychothemis testacea, including tenerals of P. coerulescens and B. asahinai. Most probably these species breed in the Mekong reach which is enriched with oxygen downstream of the great waterfall cascade.
Results of an odonatological survey of Mondulkiri Province of Cambodia, at the foothills and Central Plateau of the Annamese Mts. in June 8 – June 17, 2014 are presented. Of 106 Odonata species met (46 zygopterans, 60 anisopterans), 97 were identified to previously known named species, of which 15 are reported for the first time for Cambodia, namely Mnais mneme Ris, 1916, Rhinocypha seducta Hämäläinen et Karube, 2001, Philoganga loringae Fraser, 1927, Rhinagrion hainanense Wilson et Reels, 2001, Amphiallagma parvum (Selys, 1876), Ceriagrion chaoi Asahina, 1967, Paracercion malayanum (Selys, 1876), Prodasineura doisuthepensis Hoess, 2007, Protosticta grandis Asahina, 1985, Tetracanthagyna waterhousei McLachlan, 1898, Gomphidia kruegeri Martin, 1904, Heliogomphus chaoi Karube, 2004, Leptogomphus baolocensis Karube, 2001, Microgomphus jurzitzai Karube, 2000, Onychothemis culminicola Förster, 1904, and two species for which the specimens collected on this trip were described as new subspecies: Indolestes gracilis expressior Kosterin, 2015, Coeliccia poungyi dasha Kosterin, 2016. Five species collected on this trip have been described elsewhere as new to science, namely Onychargia priydak Kosterin, 2015, Prodasineura hoffmanni Kosterin, 2015, Asiagomphus reinhardti Kosterin et Yokoi, 2016, Euthygomphus schorri Kosterin, 2016 and Risiophlebia guentheri Kosterin, 2015. So the total number of the first country records of named species made on this trip is 22. Still four species found may be undescribed. The number of named species recorded in Cambodia has reached 178. Remarks on taxonomy and variation of Euphaea masoni Selys, 1879, E. ochracea Selys, 1859, Aciagrion approximans (Selys, 1876), and Lamelligomphus castor Lieftinck, 1941 are provided. Characters of mature males of R. seducta are updated. Notes on habitats and habits of some species are provided. Onychothemis culminicola and O. testacea Laidlaw, 1902 seem to exclude each other at rivers, the former occupying smaller and more elevated ones; a putative hybrid male was observed. General notes on the area and field impressions are briefly outlined.